Die



D 2, 1924. r H. P. ARNT ET AL DIE Filed July 16, 1921 Z\ 51 15 /76. I I4 Patented Dec. 2, 1924.

UNITED STATES PIA/TENT OFFICE.

HERALD P. ABNT .AIND THOMAS N. AIKENS, OF LAKEWOOD, OHIO.

DIE.

Application filed July 16, 1921. Serial No. 485,353.

To all whom it may concern Be it known that we, HERALD P. ARNT andTHOMAS N. ArKENs, citizen of the United States of America and subject ofthe King of Great Britain, respectively,

residing at 1552Robinwood Avenue and 1564 Wagar Avenue, respectively,city of Lakewood, in the county of Cuyahoga and Stateof Ohio, ha einvented a new and useful Improvement in Dies, of which the following isa specification, the principle of the invention being herein explainedand.the best mode in which we have contemplated applying that principle,so as to distinguish it from other inventions.

Our invention pertains to a final forming die adapted to be employedsubsequent to the dies shown described and claimed in our copendingapplications filed July 16, 1921, Serial Nos. 485,352 and 485,354respectively.

The object of the die here disclosed is to effect the concludingbendingand forming of a hollow wheel spoke resembling as closely as possiblethe well known and conventional design of a wooden wheel spoke,

-which prescribes its shape to include an enlarged nave end having onepair of substantially parallel flat sides and another pair of flat sideswhich converge in a direction toward the near extremity of the spoke.

Referring to the drawings:

Figure I is a side elevation of a die embodying our invention togetherwith a completely formed spoke indicated in dotted lines. 1

Fig. II is a plan view of our die with the punch removed.

Fig. III is a vertical section on line III-III of Fig.1.

Fig. IV is a vertical section on line IV-IV of Fig. I.

FigV is a vertical section taken on zigzag line V-V of Fig. I.

Fig. VI is a view corresponding to Fig. V showing the die open.

A bottom shoe 1 has detachably inserted in it at one end (the left endas viewed in Fig. I) a supporting die 2 fashioned with a cavity 3 thebottom 4 of which is of semicylindrical form as appears in Fig. III. Theportion 4 of the die cavity is to serve as a rest for the outer end h ofa partially formed spoke, that is to say, the end of the spoke which isto be adapted to the felloe.

A mide portion of the shoe 1 carries an-' '8 with an upper surface of ablock on the right end'of the shoe 1 as it appears in Figure I. Themandrel 7- is held in place by cap screws 9, and includes a flat surface10 downwardly inclined toward the right end as viewed in Fig. I andbounded by a pair of parallel side walls spaced apart a distancecorresponding to the distance between the parallel end walls of thepartially formed nave end of the spoke as shown in Fig. VI. The topsurface 10 of the mandrel terminates at itseupper end in an abruptshoulder formed in conjunction with an oppositely inclined slightlycurved surface 11. v I

As will be readily understood by those who are familiar with this art,the concluding formation may. be imparted to concavoconvex blanks, tomake them have a circular cross section, without the interpositioning ofa mandrel. Accordingly the sections 5 and b of the spoke blank need notenvelop a mandrel but are readily curled to closing position by a punchof appropriate contour to be presently described. However, the nave endof the spoke with its pairs of flat sides requires a mandrel to enablethe two sections bordering the seamto be properly and accurately ironeddown. When the die is in its open position as shown Fig. VI the spokeblank may be inserted from the left end of the die as 'viewedin Fig. I.

According to the showing of the drawings,

the nave end of the spoke will first be operated upon, but the order inwhich the sections of the blank which are or are not to be pressedagainst a mandrel is a matter of arbitrary selection and quiteinconsequential to our invention.

A punch holder 12 carries at the insertion end of the spoke a curlingpunch 13 having its functioning semi-cylindrical surface 14 acting in awelleknown manner to impart a truly circular form to the section b asappears in Fig. III. Another curling punch 15 provided with an underconical surface 16 is adapted to complete the formation of the section bas appears in Fig. IV. The punch holder 12 is extended laterally inopposite directions and on two. depending extensions thereof detachablcarries opposed wearing plates 17 adapte to serve the purpose of camsurfaces in co-operation with similarly spaced beveled surfaces 18 on apair of reciprocal forming dies 19 bounded for movement between guides20 and toward each other against the action of's rings 21. The punchextremities 22 of the his 19 are each fashioned on their lower sideswith angularly related surfaces 23 and 24 which correspond to the uppersurfaces 19 andll of the mandrel res ectively and as usual are adaptedto trave over such surfaces and 11 spaced therefrom substantially thethickness of the blank material. When the dies 19 approach each otherthey will bend, lay

down and iron out the upper extremities of the portions 1) ofv theblank. It will be evident from inspection of Fig. VI that when the punchholder 12 is depressed, the cam surfaces 17 presently engage the beveledsurfaces 18 tov cause the dies 19to move toward each other. In themeantime, the-curling punches and 13 will have come into-engagement withthe-sections b and b in the stated order of succession. 3

We claim p I 1. A die comprisin a shoe, a block detachably carried therey, and a mandrel detachably carried by said block, said block andmandrel having an interlocking connection along a sloping plane and themandrel projecting beyond one end of its line of connection.

2. A die comprising the combination of a support, a mandrel carriedthereby and fashioned with an inclined surface over said support, a pairof forming dies reciprocable on said support and adapted to approacheach other over said inclined mandrel surface, said dies being fashionedeach with a beveled surface, and a punch holder fashioned withcomplementarily beveled surfaces for engagement with the beveled diesurfaces.

' 3..A device of the character described comprising a sup ort having aninclined upper surface an having guides laterally thereof, a mandreldetachably secured to said surface and projecting upwardly beond' thesame, a pair of reciprocable formmg dies mounted for movement on saidguides, said dies being fashioned with beveled lateral ends and withnear extremities having inclined lower surfaces adapted to be juxtaposedto the top of the projecting portion of the mandrel, and a punch holderhaving cam surfaces adapted simultaneously to engage said beveled endsto move said dies toward each other across the top of the mandrel.

Signed by us, this 5th day of July, 1921.

- HERALD P. ARNT. THOMAS N. AIKENS.

